Water-tube boiler.



-No. 657,615. Patented Sept. ll, I900.

J. PLATT.

WATER TUBE BOILER. (Application filed Feb. 23, 1899.;

(No Model.) 2 Sheets-Sheet l.

No. 657,6|5.' Patented Sept. ll, I900. J. PLATT.

WATER TUBE BOILER.

(Application filed Feb. 23, 1899.) (No Model.)

2 Sh'eets-Sheet 2.

: oooooooooooooooooooo ooo o o ooo oo gaoooooooooooooo ooo oo ooooo ooooooooooooooo0 oo ooooono'oooo'ooooo oooooooooooooooooooooooor DOOOOOOOOOOOOQ-OOOOOOOOOOODO N o oooooooooooooooooooooo oooo'oooooooooooo 0 ,oo ooo'ooooooooocp ocoooooooooooo o o o o o o o o d b o o 0 0 o g o 0 0 o io ogozo g cfogogogoo g o d oooooooooooooo oo & 7

we "came PETERS c0 mom-Luna" WAsnmc-Tou. u. a.

7 .Nl'lED STATES PATENT (jFFICEt JOHN PLATT, or wnsTFmLD, New JERsEY.

WATER-TUBE BOILER.

srncirrda'rronrorm'ing part of Letters Patent No. 657,615, dated September '11, 1900. Application filed February 28,1899- fierial No. 706,469. (No model.)

To ctZZ whom it may concern.-

Be it known that I, JOHN PLATT, a subject of the Queen of Great Britain and Ireland, residing at Westfield, county of Union, and State of New Jersey, have invented certain new and useful Improvements in Water-Tube Boilers, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in steam-boilers of the water-tube type.

In large ships having considerable breadth amidships and in other large installations in which there is no necessity for limiting the grate-space it is desirable on account of the ease in continuous working, which is gained from the use of comparatively-small grates, to divide the grate-space up so that it may be occupied by a series of small and practicallyindependent grates.

It is the object of this invention to produce a boiler in which the grate-space shall be divided into a series of small and practicallyindependent grates, thereby gaining ease in continuous working, and in which a large number of stean1-generating tubes is brought into contact with the gases and other heated products of combustion rising from the fires, so as to add to the steam productiveness of the boiler and to at the-same time increase its eflicienoy.

WVith this and other objects in view the invention consists in certain parts, improvements, and combinations, as will be hereinafter described, and fully pointed out in the claims hereunto appended.

In the accompanying drawings, in which like characters of reference indicate the same parts, Figure 1 indicates diagrammatically in vertical section a boiler constructed in accordance with the invention. Fig. 2 is a cross-section on the line 2 2 of Fig. 1.

In the embodiment of the invention shown in the accompanying drawings a series of three grates, 1, 2, and 3, is used. It is to be understood, however, that the series of grates need not be limited to three, more being used if desired.

In the boiler selected for the purpose of illustrating the invention water-drums 4 and 5 are located at the outer edge of the outer grates of the series and water-drums 6 and 7 are located between the grates 1 and 2 and the grates 2 and 3. The boiler is provided with a plurality of steam-separating devices into which the steam and water from the circulating-tubes, to be hereinafter described, pass and in which the steam is separated from the water. These steam-separating devices preferably consist of the usual steam and water drums,'of which in the present boiler there are two, marked, respectively, 8 and 9. The steam and water passes from the drums 4t, 5, 6, and 7 to the steam collecting and separating drums through bundles or groups of bent tubes, which are preferably arranged to form combustion-chambers for the several grates. In the present boiler there are six of these groups of tubes, marked, respectively, 10, 11, 12, 13, 14, and 15. The group of tubes 10 connect the water-drum 4: with the steam-drum 8. The groups of tubes 11 and 12 connect the steam-d rum 8 with waterdrnm 6. In the same way the group of tubes 15 connects the water-drum 5 with the steam drum 9, and the groups of tubes 13 and 14: connect this steam-drum with the water-drum 7. These groups of tubes may be arranged in various ways. In the preferred form,whioh is the form shown, the outer tubes of the group 10 are arranged to form a solid wall 16.

The inner tubes of the group 10 or the tubes next the grate are spaced apart at their lower ends to form openings 17. The upper parts of these tubes form a solid wall 18, extending up to the point where these tubes come into contact with the tubes of the group 11 In the same way the outertubes of the group 11 are arranged to form a solid wall 20. The inner tubes of this group are spaced apart at their lower ends, as at 19, thus forming apertures for the admission of the gases, and above the point where these openings are formed the tubes are arranged in a close wall up to the point where they come in contact with the group of tubes 10. The remainder of the tubes of each group are inside the fluepassages formed by these two walls of tubes. All the tubes will be arranged inside the usual casing 22. At their upper ends the tubes are spaced apart, so as to allow the gases to pass directly among them and up into the uptake 21. These tubes are sh wn as passing into the steam-drum both above and beform a close wall for their entire length.

low the normal water-level of said drum. They may, if desired, however, be arranged so that all Will enter above the normal water level or all below the normal water-level.

The tubes of the groups 12, 13, 14, and 15 are arrangedin the same manner as the groups of tubes 10 and-11, and a detailed description of them is therefore deemed unnecessary. It is to be also understood that while it is preferred that the walls before referred to be formed entirely of tubes, these walls may be formed partly of tubes and partly of sheet material, the sheet material being arranged either between the tubes or inside or outside the outer rows of tubes, as desired.

While the arrangement of tubes described is deemed preferable, the invention is by no means limited to this arrangement. For instance, the outer tubes of the group 10 might be arranged to form a close wall for their entire length, and in the same way the outer tubes of the group 11 might be arranged to In this construction the outer tubes of the groups 10 and 11 will form passages or fines extending longitudinally of the steam-drum 8,'and the products will be delivered from this flue or passage at one end or the other of the boiler, as desired. In the same way the tubes of the other groups might be arranged to form longitudinalfiues or passages extending along the steam-drum. Various other modifications and arrangements of the tubes are possible. It is to be understood, therefore, that the invention is not limited to any particular arrangement of the tubes nor to the particular features of construction shown in the drawings and described in the foregoing specification. The several water and steam drums may be connected by any desired arrangement of downtake tubes, one arrangement being indicated in dotted lines in Fig. 1.

What I claim is 1. In a steam-boiler, the combination with a series of grates, of a series of steam-drums, a series of water-drums, two of which are lo cated at the outer edges of the outer grates and the remainder of which are located between the adjacent grates, and groups of bent tubes connecting the water and steam drums, said tubes being arranged to form combustion-chambers for the grates, substantially as described.

2.. In a steam-boiler, the combination with a series of grates, of a series of steam-drums, a series of water-drums, two of which are located at the outer edges of the outer grates and the remainder of which are located between the adjacent grates, and groups of tubes connecting the water and steam drums, some of the tubes standing in fines or chambers and some of the tubes being arranged in the walls of the fines or chambers, the side walls on each side of a grate being arranged to form combustion-chambers for the grate, substantially as described.

3. In a steam-boiler, the combination with a series of grates, of a series of steam-drums, a series of water-drums, two of which are located at the outer edges of the outer grates and the remainder of which are located between the adjacent grates, and groups of bent tubes connecting the water and steam drums, some of the tubes standing in fines or chambers and some of the tubes being arranged in the walls of the flues or chambers, the side walls on each side of a grate being arranged to form -co1nbustionchambers for the grate, substantially as described.

4. In a steam-boiler, the combination with a series of grates, of a series of steam-drums, a series of water-drums, two of which are located at the outer edges of the outer grates and the remainder of which are located between adjacent grates, groups of tubes connecting the water and steam drums, the inner tubes of the two groups adjacent to each grate being arranged in walls for a part of theirlength and bein g spaced from each other for the remainder of their length to form openings for the admission and escape of products, the outer tubes of one of said groups being arranged in a wall extending from the water-drum to a point adjacent to the steamdrum, and the outer tubes of the other group being arranged in a wall, substantially as de scribed.

5. In a steam-boiler, the combination with a series of grates, of a series of steam-drums,

a series of water-drums, two of which are located at the outer edges of the outer grates and the remainder of which are located between the adjacent grates, groups of bent tubes connecting the water and steam drums, the inner tubes of the two groups adjacent to each grate being arranged in walls for a part of their length and being spaced from each other for the remainder of their length to form passages for the admission and escape of products, the outer tubes of one of said groups being arranged in a wall extending from the water-drum to a point adjacent to the steam-drum, and the outer tubes of the outer group being arranged in a Wall, substantially as described.

6. In a steam-boiler, the combination with three grates and four water-drums, two of said drums being located at the outer edges of said grates and two of the drums being between two grates, of two steam-drums, and three groups of tubes connecting each steamdrum with two water-drums, substantially as described.

7. In a steam-boiler, the combination with three grates and four water-drums, two of said drums being located at the outer edges of said grates and two of the drums being between two grates, of two steam-drums, and three groups of bent tubes connecting each steam-drum with two water-drums, substantially as described.

8. In a steam-boiler, the combination with three. grates and four water-drums, two of said drums being located at the outer edges of said grates and two of the drums being between two grates, of two steam-drums, and three groups of tubes connecting each steamdrnm with two waterdrums, some of the tubes of each group being arranged in flnes or passages and some of the tubes of each group being arranged in the walls of said passages, substantially as described.

9. In a steam-boiler, the combination with three grates and four water-drums, two of said drums being located at the outer edges of said grates and two of the drums being between two grates, of two steam-drums, and three groups of bent tubes connecting each steam-drum with two water-drums, some of the tubes of each group being arranged in fines or passages and some of the tubes of each group being arranged in the walls of said passages, substantially as described.

10. In a steam-boiler, the combination with three grates, of two steam-drums arranged above the grates, four water-drums, two of said drums being arranged at the outer edges of the grates and two between adjoining grates, a group of tubes connecting each of the outer water-drums with a steam-drum, and two groups of tubes connecting each of the inner water-drums with a steam-drum, substantially as described.

11. In a steam-boiler, the combination with three grates, of two steam-drums arranged above the grates, four water-drums, two of said drums being arranged at the outer edges of the grates and two between adjoining grates, a group of tubes connecting each of the outer water-drums with the steam-drum, two groups of tubes connecting each of the inner waterdrums with the steam-drum, and the groups of tubes adjacent to each grate being arranged in the walls of the com bustionchamber for said grate, substantially as described.

12. In a steam-boiler, the combination with three grates, of two steam-drums arranged above the grates, four water-drums, two of said drums being arranged at the outer edges of the grates and two between adjoining grates, a group of bent tubes connecting each of the outer water-drums with the steamdrum, and two groups of bent tubes connecting each of the inner water-drums with the steam-drum, substantially as described.

13. In a steam-boiler, the combination with three grates, of two steam-drums arranged above the grates, four water-drums, two of said drums beingarranged at the outer edges of the grates and two between the adjoining grates, a group of bent tubes connecting each of the outer water-drums with the steamdrum, two groups of bent tubes connecting each of the inner waterdrums with the steamdrum, and the groups of bent tubes adjacent to each grate being arranged in the walls of the combustion-chamber for said grate, sub stantially as described.

14. In a steam-boiler, the combination with three grates, of four water-drums, two of the drums being arranged at the outer edges of the grates and two of the drums between adjoining grates, two steaIn-dr ums, a group of tubes connecting each of the outer waterdrums with one of the steam-drums, the outer tubes of each group being arranged in walls extending substantially from the water-drums to a point adjacent to the steam-drums and being spaced apart from this point to the steam-drum to form passages for the escape of the products, the inner tubes of each group being arranged in walls for a part of their length, the remainder of the tubes of each group being arranged between these walls, two groups of tubes connecting the inner water-drnms with the steam-drums, the outer tubes of each group being arranged in walls extending substantially from the steam-drum to the water-drum and the inner tubes of each group being arranged in walls for a part of their length and spaced apart for the remainder of their length for the admission and egress of the products and the remainder of the tubes of these groups being arranged between these walls, substantially as described.

15. In a steam-boiler, the combination with three grates, of four water-drums, two of the drums being arranged at the outer edges of the grates and two of the drums between adjoining grates, two steam-drums, a group of bent tubes connecting each of the outer water-drums with one of the steam-drums, the outer tubes of each group being arranged in walls extending substantially from the waterdrums to a point adjacent to the steam-drums and being spaced apart from this point to the steam-drum to form passages for the escape of the products, the inner tubes of each group being arranged in walls fora part of their length, the remainder of the tubes of each group being arranged between these walls, two groups of bent tubes connecting the inner water-drumswith the'steam-drums, the outer tubes of each group being arranged in walls extending substantially from the steam-dru m to the water-drum and the inner tubes of each group being arranged in walls for a part of their length and spaced apart for the remainder of their length for the admission and egress of the products and the remainder of the tubes of this group being arranged between these walls, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN PLATT.

WVitnesses:

A. V. BOURKE, T. F. Knnon. 

